Alloy 316H (UNS S31609) is a high carbon modification of Alloy 316 developed for use in elevated temperature service. The alloy has higher strength at elevated temperatures and is used for structural and pressure vessel applications at temperatures above932°F (500°C). The higher carbon content of 316H also delivers higher tensile and yield strength than 316/316L and its austeniticstructure provides excellent toughness down to cryogenic temperatures.The corrosion resistance of Alloy 316H is comparable to Alloy 316/316L and is superior to Alloy 304/304L in moderately corrosiveenvironments. It is often used in process streams containing chlorides or halides. The alloy resists atmospheric corrosion, aswell as, moderately oxidizing and reducing environments. It also resists corrosion in polluted marine conditions.Alloy 316H is non-magnetic in the annealed condition. It cannot be hardened by heat treatment, however the material will hardendue to cold working. It can be easily welded and processed by standard shop fabrication practices. The end cap on a pipe cap pressure vessel is a main pressure-bearing component of the pressure vessel. Its function is to seal.Firstly, it serves as the top and bottom of a cylindrical pressure vessel. Secondly, if the pipeline ends and is not intended to extend further, then a pipe cap is used to seal the pipe through welding. Products similar to the function of a pipe cap include blind flanges and pipe caps, but those two products can be disassembled. In contrast, once a pipe cap is welded, it cannot be disassembled. Associated fittings include pressure vessels, pipelines, flanges, elbows, tees, and crosses.